* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 菜单按钮 */
.menu-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 30px;
    height: 30px;
    cursor: pointer;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s ease;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    transform: scale(1.1);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* 侧边菜单 */
.side-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: white;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 1000;
    padding: 20px;
}

.side-menu.active {
    right: 0;
}

.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.menu-header h3 {
    color: #333;
    font-size: 1.2rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    color: #333;
}

.menu-items {
    list-style: none;
}

.menu-items li {
    margin-bottom: 15px;
}

.menu-items a {
    text-decoration: none;
    color: #333;
    font-size: 1.1rem;
    padding: 10px 0;
    display: block;
    transition: color 0.3s ease;
}

.menu-items a:hover {
    color: #667eea;
}

/* 遮罩层 */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 主要内容 */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.hero-section {
    text-align: center;
    max-width: 800px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 300;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px;
    margin: 0;
    animation: fadeInUp 1s ease-out 0.3s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 页脚 */
.footer {
    padding: 20px;
    text-align: center;
}

.footer-content p {
    color: white;
    font-size: 0.9rem;
    opacity: 0.8;
    margin: 0;
}

.footer-content a {
    color: white;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s ease;
    margin-left: 5px;
}

.footer-content a:hover {
    opacity: 1;
    text-decoration: underline;
}